Heat sink for LED light bulb



FIG. 1 is a perspective view of a heat sink for an LED light bulb showing our design;

FIG. 2 is a front view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design of a heat sink for LED light bulb, as shown and described. 